there's more to the sonar than in this whole process. that unmanned vehicle has to have navigation systems. all of those systems have to work together. >> so let's take a look and you get that data. in the process of what you get from the sonar. >> we have been mapping throughout the day here. they're going set up a grid pattern and they're going to move that grid pattern and that's what you see here. we're now at this point and building up additional mapping information. this is going to construct the map. we're going see this live. we have gps. they don't find this until the